Run windows-app in foreground mode

I have a local gitlab-runner configured on my Windows machine to execute powershell-scripts.
I am looking for an opportunity to start some process in foreground mode with a window and a gui (and may be under admins). How can I implement this?
All of process starts only in background. I tried to use the call of psexec in my ps1-script - everything works when I launch it manually, but through the runner - no success at all, even in running notepad.
Can anyone suggest a working method to achieve this?